USDA and NRCS Identifier NRCS Logo Web Site PLANTS photo banner
PLANTS Home about PLANTS PLANTS Team Partners of PLANTS What's New at PLANTS National Plant Data Team Web Site Help using PLANTS Contact PLANTS
 Search the PLANTS Web site
 Name Search

PLANTS Image Gallery
Download PLANTS data
Related tools
You are here: Home / Plant Profile

Polygonum persicaria L.
spotted ladysthumb

General Information
Symbol: POPE3
Group: Dicot
Family: Polygonaceae
Duration: Annual
Growth Habit: Forb/herb
Native Status: CAN   I
GL   I
L48   I
AK   I
Data Source and Documentation
Plants-NRCS Logos
green round image for nativity Native blue round image for introduced Introduced ocre round image for introduced and nativity Both white round image for no status Absent/Unreported
image for native, but no county data Native, No County Data image for introduced, but no county data Introduced, No County Data both introduced and native, but no county data Both, No County Data
Native Status:
lower 48 status L48    Alaska status AK    Hawaii status HI    Puerto Rico status PR    Virgin Islands status VI    Canada status CAN    Greenland status GL    Saint Pierre and Michelon status SPM   


Symbol Scientific Name
PEVU Persicaria vulgaris Webb & Moq.
POMI11 Polygonum minus auct. non Huds.
POMIS Polygonum minus Huds. var. subcontinuum (Meisn.) Fernald
PERU8 Persicaria ruderalis (Salisb.) C.F. Reed
PEMA17 Persicaria maculata (Raf.) Gray
PEMA24 Persicaria maculosa Gray
POPEA2 Polygonum persicaria L. var. angustifolium Beckh.
PEPU5 Persicaria puritanorum (Fernald) Soják
POPER2 Polygonum persicaria L. var. ruderale (Salisb.) Meisn.
PODU3 Polygonum dubium Stein
PERUV Persicaria ruderalis (Salisb.) C.F. Reed var. vulgaris (Webb & Moq.) C.F. Reed
POFU Polygonum fusiforme Greene
PEPE18 Persicaria persicaria (L.) Small, nom. inval.
POPU11 Polygonum puritanorum Fernald


Click on a scientific name below to expand it in the PLANTS Classification Report.
Rank Scientific Name and Common Name
Kingdom Plantae – Plants
Subkingdom Tracheobionta – Vascular plants
Superdivision Spermatophyta – Seed plants
Division Magnoliophyta – Flowering plants
Class Magnoliopsida – Dicotyledons
Subclass Caryophyllidae
Order Polygonales
Family Polygonaceae – Buckwheat family
Genus Polygonum L. – knotweed
Species Polygonum persicaria L. – spotted ladysthumb

Subordinate Taxa

This plant has no children

Legal Status

Threatened and Endangered Information:
This plant is listed by the U.S. federal government or a state. Common names are from state and federal lists. Click on a place name to get a complete protected plant list for that location.
Polygonum puritanorum
pondshore knotweed
Special Concern
U.S. Weed Information
Polygonum persicaria
lady's thumb
ladysthumb smartweed
This plant can be weedy or invasive according to the authoritative sources noted below.This plant may be known by one or more common names in different places, and some are listed above. Click on an acronym to view each weed list, or click here for a composite list of Weeds of the U.S.
SEEPPC Southeast Exotic Pest Plant Council. 1996. Invasive exotic pest plants in Tennessee (19 October 1999). Research Committee of the Tennessee Exotic Pest Plant Council. Tennessee.
SWSS Southern Weed Science Society. 1998. Weeds of the United States and Canada. CD-ROM. Southern Weed Science Society. Champaign, Illinois.
WSWS Whitson, T.D. (ed.) et al.. 1996. Weeds of the West. Western Society of Weed Science in cooperation with Cooperative Extension Services, University of Wyoming. Laramie, Wyoming.

Wetland Status

Interpreting Wetland Status


PEMA24  Persicaria maculosa Gray

Top Level Regions
Alaska FAC
Arid West FACW
Atlantic and Gulf Coastal Plain FACW
Eastern Mountains and Piedmont FACW
Great Plains FACW
Midwest FACW
Northcentral & Northeast FAC
Western Mountains, Valleys, and Coast FACW

PEPU5  Persicaria puritanorum (Fernald) Soják

Top Level Regions
Northcentral & Northeast FACW



Source Large Mammals Small Mammals Water Birds Terrestrial Birds
Martin Minor Low Low


Source Large Mammals Small Mammals Water Birds Terrestrial Birds


Martin, A.C., H.S. Zim, and A.L. Nelson. 1951. American wildlife and plants: A guide to wildlife food habits. Dover Publications. New York.

Description of Values

Value Class Food Cover
High Average 25-50% of diet Regular source of cover
Low 5-10% of diet Infrequently used as cover
Minor 2-5% of diet Sparsely used as cover
Moderate Average 10-25% of diet Occasional source of cover